In the 1991 film JFK, Joe Pesci portrayed David Ferrie who famously describes President Kennedy’s assassination as “a mystery wrapped in a riddle inside an enigma.” The quote was borrowed from a radio address Winston Churchill delivered over the British Broadcasting Company October 1, 1939, to bolster Britons’ concerns about an impending war with Germany. In that stirring address, Churchill described Russia as “a mystery wrapped in a riddle inside an enigma; but perhaps there is a key. That key is Russian national interest.” But what does Churchill, JFK, or Joe Pesci have to do with researching Beach Boys concerts in 1962? Well, that quote aptly describes what it felt like trying to document the band’s appearances at Rainbow Gardens—a mystery wrapped in a riddle inside an enigma. Only there was no key. Until now. Maybe. Rainbow Gardens was a nightclub and dance hall located at 150 East Monterey in Pomona, California, thirty miles east of Los Angeles. It held about 800 people. By early 1962, it was owned by LA record promoter Eddie Davis …